Title :
Limited maximum fault-multiplicity diagnosis procedure for scan designs
Author :
Solana, J.M. ; Manzano, M.A.
Author_Institution :
Fac. de Ciencias, Cantabria Univ., Santander, Spain
fDate :
11/1/2000 12:00:00 AM
Abstract :
A new effect-cause approach to multiple fault diagnosis in digital circuits is presented. The previous elimination algorithm is extended to sequential circuits. A new procedure capable of diagnosing any `stuck-at´ type fault with limited maximum multiplicity in full scan or partial scan designs is developed. The limit is established for each logic partition of the circuit. With this new algorithm, any trial that would lead to faults of multiplicity greater than the established limit is determined a priori and is rejected. This greatly reduces the diagnostic computing time, without affecting its utility, and without probing any internal line. It can also obtain masked faults with or without a multiplicity limit. Experimental results for some full scan circuits from the ISCAS´89 benchmarks are included
Keywords :
fault diagnosis; logic design; logic testing; sequential circuits; ISCAS´89 benchmarks; diagnostic computing time; digital circuits; full scan circuits; limited maximum fault-multiplicity diagnosis; logic partition; masked faults; scan designs; sequential circuits;
Journal_Title :
Computers and Digital Techniques, IEE Proceedings -
DOI :
10.1049/ip-cdt:20000786